Mechanism for fastening barrels to gunstocks



(No Model.)

W. H. DAVENPORT. MECHANISM FOR FASTENING BARRELS T0 GUNSTOOKS'.

Patented July 2. 18-89.

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\VILLIAM H. DAVENPORT, OF NORIVICH, CONNECTICUT.

MECHANISM FOR FASTENING BARREIIS TO GUNSTOCKS.

SPECIFICATION forming part of Letters Patent No. 406,032, dated July 2,1889. Application filed November 24, 1888- Serial No. 291,741. (Nomodel.)

To all whom it may concern.-

Be it known that 1, WILLIAM H. DAVEN- PORT, a citizen of the UnitedStates, residing at Norwich, in the county of New London and State ofConnecticut, have invented certain new and useful Improvements inFire-Arms, which improvements are fully set forth and described in thefollowingspecification, reference being had to the accompanying sheet ofdrawings.

This invention is in the class of arms in which the barrel is removablyattached to the breech-frame, said invention having particular referenceto the pin by means of which this barrel and frame are locked together.

On the 23d of June, 1885, I was granted by the United States of Americaa patent, No. 320,637, for a locking pin which passed through the frameand across the lower portion of the barrel, said pin having ascrewthreaded inner end and an operating-handle on its outer end. Whenit was desired to remove the barrel from the frame in an arm of thisconstruction, the pin handle was grasped and the pin unscrewed. Thisconstruction allowed said pin to be entirely withdrawn from the frame,and occasionally during the operation of removing or changing barrels alocking-pin would be dropped and lost, thus rendering the arminoperative until it could be repaired.

The object of this present invention is to provide a stop plug or boltwhich shall act automatically to prevent the locking-pin from beingentirely removed from the frame when unscrewed.

The annexed drawings illustrate my said improvement, Figure 1 being aside view of the breech-frame of a rifle, with a portion of the barrelattached thereto. Fig. 2 is a front end view of the breech-frame. Fig. 3is a longitudinal cross-section of the frame on line 0: Q3 of Fig. 2,showing the locking-pin seated in said frame; and Fig. 4 is a similarview showing said pin withdrawn to allow the removal of the barrel. InFig. 5 I have shown a pin in which the screw-threads are dispensed with,said pin being held against displacement by the spring-pressed plug orbolt 6, hereinafter described. Fig. 6 shows a crosssection of a framesimilar to Figs. 3 and 4,

having seated therein a lockingqoin of the form illustrated in Fig. 5.

The letter a in said drawings denotes the breech-frame and b the barrel,said barrel being turned down at its rear end to enter the frame. 0indicates a locking pin, which passes through the frame a and across thelower side of the barrel, as described in my former patent of 1885,above referred to. The frame a is bored and counterbored from its frontend, as at (Z, to provide a hole leading into the opening which receivesthe locking pin 0, and in the supplemental hole thus formed I place aplug 6, whose point may extend into said pin opening or seat. Havingdropped the plug into the hole (I, I place a spring h behind it, andthen confine said plug and spring by a screwc' screwed into said hole(1. This construction provides a spring-pressed bolt whose inner endbears constantly against the locking-pin c, which, near its threadedend, is provided with an annular groove 7;, of such width that the endof the plug (2 may onter it when said groove and plug are brought intocoincidence.

WVhen it is desired to remove the barrel of an arm embodying my presentinvention,the locking-pin c is unscrewed and withdrawn until plug 6snaps into the groove 7t',l11 which position the pin end is clear of thebarrel, which may then be removed.

The side wall of the groove 7.; nearest the handle is beveled, asillustrated in the drawings, so that the plug e may be easily pressedback to its seat against the force of the spring h when it is desired toagain assemble and lock together the frame and barrel.

The inner end of the pin 0, instead of being threaded, may be left plainand a second annular groove on provided at a point coincident with theend of the plug 6 when the locking-pin c is forced into its seatthat is,when it is in the position shown in Fig. 6. The pressure of the plug 6in said supplemental groove m is sufficient to prevent the accidentaldisplacement or removal of the pin 0, but may be easily overcome when itbecomes necessary to withdraw said pin.

l'laving described my invention, I claim 1. In. combination with theframe of an arm, a barrel fitted therein, an annularly-grooved pin(seated in said frame) passing across said barrel to interlock saidframe and barrel, and a spring-pressed plug seated in said frame havingits end coincident with and adapted to engage said annular groove,substantially as and for the purpose specified.

2. In combination with the frame and barrel of an arm, a locking-pinpassing through the frame and across the barrel and having two annulargrooves, as set forth, and a springpressed plug seated in said framehaving its end bearing against said locking-pin when the parts areassembled, the said annular grooves being located in such relation toeach other that said spring-pressed plug enters one of said grooves whensaid pin is withdrawn and the other when said pin is forced forward intoits seat, substantially as and for the objects specified.

WVILLIAM H. DAVENPORT.

Witnesses:

FRANK H. ALLEN, ALONZO M. LUTHER.

